HP StorageWorks A7298A Installation Manual page 84

Glossary
Cladding
The dielectric material surrounding the core of an electrical fiber or material surrounding the
core of a fiber optic cable. It usually refers to diameter, often 125 m, measured in microns.
Connector
A mechanical device used to align and join two fibers together to provide a means for attaching
and decoupling it to a transmitter, receiver, or another fiber.
Core
The central region of an optical fiber through which light is transmitted.
Custom Device Module (CDM)
A CDM is the driver component in the NetWare Peripheral Architecture used to drive specific
storage devices attached to the HBA. See also NetWare Peripheral Architecture.
Data Rate
The maximum number of bits of information that can be transmitted per second in a data
transmission link. It is typically expressed as Megabits per second (Mbps).
Device Driver
A software program that enables a personal computer to communicate with hard drives,
CD-ROM drives, printers, and other peripherals. Device drivers are stored on a hard drive and
are loaded into memory at boot up.
Duplex Cable
A two-fiber cable suitable for duplex transmission or transmissions in two directions.
Duplex Transmission
Transmission in both directions, either one direction at a time (half duplex) or both directions
simultaneously (full duplex).
Fabric
A Fibre Channel interconnection method that allows multiple simultaneous and concurrent data
transfers between multiple hosts and/or storage devices connected with a multi-port hub.
FC-AL
Abbreviation for Fibre Channel Arbitrated Loop, an interconnection scheme that supports from
1 to 126 ports on a loop in a shared medium topology.
FCP
Fibre Channel Protocol.
FDDI
Fibre Distributed Data Interface. A network based on the use of optical-fiber cable to transmit
data at 100Mbit/sec.
84 Host Bus Adapter for Windows and Linux Installation Guide